​in-ter-rog-a-tive adj. 1. Asking a question or being of the nature of a question.

Membership rates will increase January 1, 2019. Individual from $35 to $45; Family from $75 to $99; Contributing from $125 to $150; and Sustaining from $250 to $300. "Oklahoma Museum Network" add-on (Family-level or higher) remains $55. Join or renew/extend now to get 2018 pricing!